Beat cream cheese and sugar in large bowl with mixer until well blended. Add sour cream; mix well. Add eggs, 1 at a time, mixing on low speed after each just until blended. Remove 3-1/2 cups batter; place in medium bowl. Dissolve remaining coffee granules in remaining hot water. Stir into removed batter; pour over wafers in pan. Top with remaining wafers; brush with remaining dissolved coffee. Cover with remaining plain batter.